Pocket guns (.380 semis and 38s revolvers) seem to be very popular among typical folks that I talk to at the range, but not so much with the more dedicated gun folks, they seem to prefer double-stack semis or single-stack 1911's (I don't know if it is a generational thing, but it always seems to move from the former to the latter with age).

I started with a 38s AirWeight, hated trying to practice with it, tried carrying a double-stack 9MM, hated trying to carry it and ended up with a single-stack 9MM compact that carries easily and is enjoyable to shoot at the range.